MyFoxNY.comA UPS plane at Newark Liberty International Airport is search after a report of a suspicious package. (Fox 5/MyFoxNY.com)

NEWARK — Federal aviation officials are investigating reports of suspicious packages on a UPS plane at Newark Liberty International Airport and two other cargo planes at Philadelphia International Airport, officials said.

One of the UPS cargo planes landed at Newark airport this morning. The plane was moved to a remote area of the airport and video provided by MyFoxNY.com showed dozens of vehicles surrounding the investigation.

A package termed "suspicious" by the Transportation Security Administration was offloaded from the UPS plane in Newark and left on a pallet for closer examination by a bomb squad, sources say. That flight came in overnight from Cologne, Germany, but began in Yemen, where al-Qaeda is known to operate.

A source with knowledge of the situation who was not authorized to speak said officials in New York were examining a UPS package.

In New York City, police responded to reports of a possible explosive in a UPS at the Queensboro Bridge, top NYPD spokesman Paul Browne said. Browne said the package was removed and was being examined in Brooklyn.

Officials in the United Kingdom found a toner cartridge on a cargo plane Thursday night that had wires attached to it and white powder, according to a government official. The discovery of the toner cartridge prompted a search of the cargo planes and a truck in the United States. Tests on the device in the UK tested negative for explosives.

The UPS flight that landed in Philadelphia at 8 a.m. arrived from Germany, according to a report on CBSPhilly.com The flight and was scheduled to leave for Louisville, Kentucky at 10:30 a.m., CBSPhilly.com said.

The other plane in Philadelphia came from Paris, CNN reported.

"The Transportation Security Administration (TSA) is aware of and monitoring reports of potentially suspicious items onboard cargo flights that landed safely at Newark Liberty and Philadelphia International airports," TSA spokeswoman Ann Davis said in a statement. "Out of an abundance of caution the planes were moved to a remote location where they are being met by law enforcement officials and swept."

Philadelphia International Airport spokeswoman Victoria Lupica says Philadelphia police and other agencies are with the plane at a remote part of that airport. Video from the airport shows emergency vehicles around a UPS jet.

A UPS spokeswoman did not immediately know what prompted authorities to search the flight at Philadelphia.

CNN is also reporting that a UPS truck in Queens, New York is being investigated for a suspected explosive device. New York police declined to say whether the discovery is connected to the airport incidents, CNN reported.